Valve tappet and the like for internal-combustion engines



June 23,1925.

- a. KLIPSTEIN VALVE TAPEET AND THE LIKE FOE} INTERNAL COMBUSTION ENGINE Filed July 25, 1924 mun 4 number of balls 26 constituting a ball bearing. The block 24: has a threaded stem 27 which is threaded into the worm gear so that by turning the worm gear the block 24 will beraised or lowered, provided it is not allowed to rotate. Such rotation of the block 24 is resisted by a pin 28 which is threaded through the wall of the member 17, and the inner end of which engages a vertical slot 29 in the block 24. After the vertical adjustment of the block 24 has been efiiected, the pin 28 can be tightened up so as to lock said block rigidly in place, in addition to the presence of other forces, tending to hold the same in place. a

In order to turn the worm gear 25 for the above adjustment, I have provided a short worm 30 working in the .upper portion of the member 17 and engaging the worm gear. This worm 30 has one end socketed in the member 17 at the point 31, and its other end 32 is provided with a slot for the reception of a screw driver.

I v upper end A plate 33 is secured to the outside face of the upper portion of the member 17 by a screw 34. This plate 33 overlies the end of the worm 30 but has an opening 35 in line with the slotted end of the worm, so that the screw driver adjustment can be easily made.

It will be noted that when in service the parts are so adjusted that the tappet rod is in. firm contact with the ball 24 at its upper end, and with the cam shaft or tappet guide assembly at its lower end, the rocker arm 12 being at the same time in-contact with the of the valve stem 8 and with the upper end 19 of the lug 18. As a consequence there never exists any clearance between the part's, even when the operating cam is at its lowest position. At such time, however, the convolutions of the light spring are slightly separated, as indicated in Fig. 2. Immediately upon the raising of the cam these convolutions are brought together and then tlre full lifting force is exerted througn the medium of the unit.

It will be understood that a similar construction can be readily used at the lower end of 'a tappet rod, as, for example, in connection with the stems of valves which are to i be raised when opened. I do not, however, deem it necessary to illustrate the various other forms of construction which will readily suggest themselves to the user.

I claim: I

1. As a new article of manufacture, a device for the purpose specified including a cylindrical member having a downwardly extending guide sleeveat its lower end for the accommodation of the upper end of-a tappet rod, a ball within said member adapted to receive the thrusts of the u per end of said rod, an adjustment block within said cylindrical member above the ball, a spring between the adjustment block and ball, a threaded stem on the upper end of the adjustment block, a worm gear threaded on said stem, a ball bearing between said worm gear and the upper end of the cylindrical member, a worm extending across thecylim drical member and engaging the worm gear, whereby the position of the adjustment block may be varied by the adjustment of the worm, means for-locking the adjustment block in adjusted position, and a hemispherical head on the upper end of the member,

substantially as described.

2. As a new article of manufacture, a selfcontained tappet member including a cylindrical element having an opening at its lower end for the accommodation of the upper end of a tappet rod or the like, an adjustment block within the cylindrical member above the position of said opening, a

spring between the adjustment block and opening to transmit the thrust from the tappet rod to the block, means within the cylindrical element for adjusting the position of the adjustment block comprising a worm rotatably mounted within the upper end of the cylindrical member and a transverse screw for engaging said worm and journaled in the upper portion of the cylindrical member. a suitable connection on the upper end of the cylindrical member for the transmission of the operating force from the cylindrical member, and means in conjunction with the cylind ical member for retaining the spring in pace therein and for re-- taming the adjustment block and the adjusting means in their adjusted position with respect to the cylindrical memberat all times, substantially as described. 

